<?php

function fetch_youku_flv($url){
	preg_match("#id_(.*?)\.html#",$url,$out);
	$id=$out[1];
// 	$content=get_curl_contents('http://player.youku.com/player.php/sid/'.$id.'/v.swf');
	return 'http://player.youku.com/player.php/sid/'.$id.'/v.swf';
// 	$data=json_decode($content);
// 	foreach($data->data[0]->streamfileids AS $k=>$v){
// 		$sid=getSid();
// 		$fileid=getfileid($v,$data->data[0]->seed);
// 		$one=($data->data[0]->segs->$k);
// 		if($k == 'flv' || $k == 'mp4') return "http://f.youku.com/player/getFlvPath/sid/{$sid}_00/st/{$k}/fileid/{$fileid}?K={$one[0]->k}";
// 		continue;
// 	}
}
function get_curl_contents($url, $second = 5){
	if(!function_exists('curl_init')) die('php.ini未开启php_curl.dll');
	$c = curl_init();
	curl_setopt($c,CURLOPT_URL,$url);
	$UserAgent=$_SERVER['HTTP_USER_AGENT'];
	curl_setopt($c,CURLOPT_USERAGENT,$UserAgent);
	curl_setopt($c,CURLOPT_HEADER,0);
	curl_setopt($c,CURLOPT_TIMEOUT,$second);
	curl_setopt($c,CURLOPT_RETURNTRANSFER, true);
	$cnt = curl_exec($c);
	$cnt=mb_check_encoding($cnt,'utf-8')?iconv('gbk','utf-8//IGNORE',$cnt):$cnt; //字符编码转换
	curl_close($c);
	return $cnt;
}
function getSid() {
	$sid = time().(rand(0,9000)+10000);
	return $sid;
}
function getkey($key1,$key2){
	$a = hexdec($key1);
	$b = $a ^ 0xA55AA5A5;
	$b = dechex($b);
	return $key2.$b;
}
function getfileid($fileId,$seed) {
	$mixed = getMixString($seed);
	$ids = explode("*",$fileId);
	unset($ids[count($ids)-1]);
	$realId = "";
	for ($i=0;$i < count($ids);++$i) {
		$idx = $ids[$i];
		$realId .= substr($mixed,$idx,1);
	}
	return $realId;
}
function getMixString($seed) {
	$mixed = "";
	$source = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/\\:._-1234567890";
	$len = strlen($source);
	for($i=0;$i< $len;++$i){
		$seed = ($seed * 211 + 30031) % 65536;
		$index = ($seed / 65536 * strlen($source));
		$c = substr($source,$index,1);
		$mixed .= $c;
		$source = str_replace($c, "",$source);
	}
	return $mixed;
}